Similarly, our reputation score based regulation is also relevant for the directed acyclic graph (DAG) based blockchain such as IOTA Tangle [1]}. In Tangle, a new transaction selects previous transactions based on Markov Chain Monte Carlo algorithms [2]} to verify and join the DAG. By using our reputation scores, the selection procedure can give a transaction a reputation score based on the user behavior. An honest user wants to operate according to the blockchain network rules and associate with fellow honest users. It also wants to play its part in keeping the blockchain network free from illicit entities. Hence, the reputation score can be used by the new transaction to select those transactions to join with which are done by the honest users.
